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When replacing a column, it seems the replacing expression is column based, whereas when adding a column we can do it rowwise. Does the API support replacing columns with an expression that mimics add? Example:
```    irisData
        .add("SpeciesWithPrefix"){ "prefix" +  "Species"&lt;String&gt;()} // record expression
        .replace("Species")
        .with { it.cast&lt;String&gt;().map { "prefix_" + it } } // same idea but here a column expression seems required```

Hi! `convert` is a special case of `replace` for this task
 <https://kotlin.github.io/dataframe/operations.html#shortcut-operations>
 <https://kotlin.github.io/dataframe/convert.html>

Thanks for the hint. It's still somewhat hard for me to discover/link these API bits.